Cardiac valve



FIG. 1 is a perspective view of our cardiac valve showing our new design in an open position;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof, the back view being identical thereto;

FIG. 4 is a right side view thereof, the left side view being identical thereto;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a perspective view of the cardiac valve in a closed position. 

The ornamental design for a cardiac valve, as shown and described. 